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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** USBX Component */ |
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/** */ |
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/** Device CDC_ECM Class */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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#define UX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "ux_api.h" |
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#include "ux_device_class_cdc_ecm.h" |
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#include "ux_device_stack.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _ux_device_class_cdc_ecm_change PORTABLE C */ |
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/* 6.3.0 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function changes the interface of the CDC_ECM device */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* command Pointer to cdc_ecm command */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Completion Status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _ux_network_driver_link_up Link status up */ |
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/* _ux_network_driver_link_down Link status down */ |
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/* _ux_utility_memory_set Set memory */ |
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/* _ux_device_thread_resume Resume thread */ |
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/* _ux_device_event_flags_set Set event flags */ |
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/* _ux_device_stack_transfer_all_request_abort */ |
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/* Abort transfer */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* USBX Source Code */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_device_class_cdc_ecm_change(UX_SLAVE_CLASS_COMMAND *command) |
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{ |
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UX_SLAVE_INTERFACE *interface_ptr; |
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UX_SLAVE_CLASS *class_ptr; |
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UX_SLAVE_CLASS_CDC_ECM *cdc_ecm; |
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UX_SLAVE_ENDPOINT *endpoint; |
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/* Get the class container. */ |
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class_ptr = command -> ux_slave_class_command_class_ptr; |
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/* Get the class instance in the container. */ |
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cdc_ecm = (UX_SLAVE_CLASS_CDC_ECM *) class_ptr -> ux_slave_class_instance; |
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/* Get the interface that owns this instance. */ |
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interface_ptr = (UX_SLAVE_INTERFACE *) command -> ux_slave_class_command_interface; |
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/* Locate the endpoints. Control and Bulk in/out for Data Interface. */ |
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endpoint = interface_ptr -> ux_slave_interface_first_endpoint; |
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/* If the interface to mount has a non zero alternate setting, the class is really active with |
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the endpoints active. If the interface reverts to alternate setting 0, it needs to have |
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the pending transactions terminated. */ |
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✓✓ |
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if (interface_ptr -> ux_slave_interface_descriptor.bAlternateSetting != 0) |
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{ |
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/* Parse all endpoints. */ |
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✓✓ |
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while (endpoint != UX_NULL) |
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{ |
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/* Check the endpoint direction, and type. */ |
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✓✓ |
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if ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) == UX_ENDPOINT_IN) |
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{ |
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/* Look at type. */ |
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✓✓ |
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if ((endpoint -> ux_slave_endpoint_descriptor.bmAttributes & UX_MASK_ENDPOINT_TYPE) == UX_BULK_ENDPOINT) |
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/* We have found the bulk in endpoint, save it. */ |
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cdc_ecm -> ux_slave_class_cdc_ecm_bulkin_endpoint = endpoint; |
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#if (UX_DEVICE_ENDPOINT_BUFFER_OWNER == 1) && !defined(UX_DEVICE_CLASS_CDC_ECM_ZERO_COPY) |
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endpoint -> ux_slave_endpoint_transfer_request. |
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ux_slave_transfer_request_data_pointer = |
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UX_DEVICE_CLASS_CDC_ECM_BULKIN_BUFFER(cdc_ecm); |
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#endif |
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} |
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else |
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{ |
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/* Look at type for out endpoint. */ |
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✓✓ |
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if ((endpoint -> ux_slave_endpoint_descriptor.bmAttributes & UX_MASK_ENDPOINT_TYPE) == UX_BULK_ENDPOINT) |
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/* We have found the bulk out endpoint, save it. */ |
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cdc_ecm -> ux_slave_class_cdc_ecm_bulkout_endpoint = endpoint; |
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#if (UX_DEVICE_ENDPOINT_BUFFER_OWNER == 1) && !defined(UX_DEVICE_CLASS_CDC_ECM_ZERO_COPY) |
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endpoint -> ux_slave_endpoint_transfer_request. |
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ux_slave_transfer_request_data_pointer = |
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UX_DEVICE_CLASS_CDC_ECM_BULKOUT_BUFFER(cdc_ecm); |
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#endif |
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} |
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/* Next endpoint. */ |
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endpoint = endpoint -> ux_slave_endpoint_next_endpoint; |
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} |
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/* Now check if all endpoints have been found. */ |
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✓✓✓✓
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if (cdc_ecm -> ux_slave_class_cdc_ecm_bulkout_endpoint == UX_NULL || cdc_ecm -> ux_slave_class_cdc_ecm_bulkin_endpoint == UX_NULL) |
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/* Not all endpoints have been found. Major error, do not proceed. */ |
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return(UX_ERROR); |
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/* Declare the link to be up. */ |
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cdc_ecm -> ux_slave_class_cdc_ecm_link_state = UX_DEVICE_CLASS_CDC_ECM_LINK_STATE_UP; |
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/* Communicate the state with the network driver. */ |
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_ux_network_driver_link_up(cdc_ecm -> ux_slave_class_cdc_ecm_network_handle); |
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#if (UX_DEVICE_ENDPOINT_BUFFER_OWNER == 1) && defined(UX_DEVICE_CLASS_CDC_ECM_ZERO_COPY) |
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/* There is no endpoint buffer. */ |
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#else |
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/* Reset the endpoint buffers. */ |
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_ux_utility_memory_set(cdc_ecm -> ux_slave_class_cdc_ecm_bulkout_endpoint -> ux_slave_endpoint_transfer_request. |
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ux_slave_transfer_request_data_pointer, 0, UX_DEVICE_CLASS_CDC_ECM_BULKOUT_BUFFER_SIZE); /* Use case of memset is verified. */ |
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_ux_utility_memory_set(cdc_ecm -> ux_slave_class_cdc_ecm_bulkin_endpoint -> ux_slave_endpoint_transfer_request. |
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ux_slave_transfer_request_data_pointer, 0, UX_DEVICE_CLASS_CDC_ECM_BULKIN_BUFFER_SIZE); /* Use case of memset is verified. */ |
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#endif |
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/* Resume the endpoint threads. */ |
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_ux_device_thread_resume(&cdc_ecm -> ux_slave_class_cdc_ecm_bulkout_thread); |
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_ux_device_thread_resume(&cdc_ecm -> ux_slave_class_cdc_ecm_bulkin_thread); |
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/* Wake up the Interrupt thread and send a network notification to the host. */ |
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_ux_device_event_flags_set(&cdc_ecm -> ux_slave_class_cdc_ecm_event_flags_group, UX_DEVICE_CLASS_CDC_ECM_NETWORK_NOTIFICATION_EVENT, UX_OR); |
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/* If there is an activate function call it. */ |
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✓✓ |
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if (cdc_ecm -> ux_slave_class_cdc_ecm_parameter.ux_slave_class_cdc_ecm_instance_activate != UX_NULL) |
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/* Invoke the application. */ |
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cdc_ecm -> ux_slave_class_cdc_ecm_parameter.ux_slave_class_cdc_ecm_instance_activate(cdc_ecm); |
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} |
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else |
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{ |
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/* In this case, we are reverting to the Alternate Setting 0. */ |
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/* Declare the link to be down. */ |
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cdc_ecm -> ux_slave_class_cdc_ecm_link_state = UX_DEVICE_CLASS_CDC_ECM_LINK_STATE_DOWN; |
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/* Communicate the state with the network driver. */ |
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_ux_network_driver_link_down(cdc_ecm -> ux_slave_class_cdc_ecm_network_handle); |
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/* Terminate the transactions pending on the bulk in endpoint. If there is a transfer on the |
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bulk out endpoint, we simply let it finish and let NetX throw it away. */ |
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_ux_device_stack_transfer_all_request_abort(cdc_ecm -> ux_slave_class_cdc_ecm_bulkin_endpoint, UX_TRANSFER_APPLICATION_RESET); |
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/* Notify the thread waiting for network notification events. In this case, |
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the event is that the link state has been switched to down. */ |
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_ux_device_event_flags_set(&cdc_ecm -> ux_slave_class_cdc_ecm_event_flags_group, UX_DEVICE_CLASS_CDC_ECM_NETWORK_NOTIFICATION_EVENT, UX_OR); |
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/* Wake up the bulk in thread so that it can clean up the xmit queue. */ |
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_ux_device_event_flags_set(&cdc_ecm -> ux_slave_class_cdc_ecm_event_flags_group, UX_DEVICE_CLASS_CDC_ECM_NEW_DEVICE_STATE_CHANGE_EVENT, UX_OR); |
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/* If there is a deactivate function call it. */ |
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✓✓ |
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if (cdc_ecm -> ux_slave_class_cdc_ecm_parameter.ux_slave_class_cdc_ecm_instance_deactivate != UX_NULL) |
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/* Invoke the application. */ |
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cdc_ecm -> ux_slave_class_cdc_ecm_parameter.ux_slave_class_cdc_ecm_instance_deactivate(cdc_ecm); |
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} |
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/* Set the CDC ECM alternate setting to the new one. */ |
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cdc_ecm -> ux_slave_class_cdc_ecm_current_alternate_setting = interface_ptr -> ux_slave_interface_descriptor.bAlternateSetting; |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_CDC_ECM_CHANGE, cdc_ecm, 0, 0, 0, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0) |
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/* If trace is enabled, register this object. */ |
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UX_TRACE_OBJECT_REGISTER(UX_TRACE_DEVICE_OBJECT_TYPE_INTERFACE, cdc_ecm, 0, 0, 0) |
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/* Return completion status. */ |
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return(UX_SUCCESS); |
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} |
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